Justification
This species qualifies as Vulnerable as it is only found on one small island where it remains at risk from the accidental introduction of exotic species.

Threats
The species has apparently adapted to the presence of Pacific rat Rattus exulans. However, the accidental introduction of a more aggressive predator, such as another Rattus species, could be devastating, and introduced diseases, such as avian malaria and pox, are another potential threat. The introduction of exotic plant species could have serious consequences for the native vegetation⁴ and therefore for this species too.

Conservation
In 1988, Henderson was designated a World Heritage Site. Rat eradication has been investigated and is feasible but difficult because of the island's isolation¹.

Targets
*Periodically resurvey to monitor numbers and trends. *Ensure that further alien species are not accidentally introduced to Henderson . *Consider the eradication of rats from Henderson¹. *Re-attempt the eradication of rats from nearby Pitcairn Island , and consider translocating the species there when it becomes rat-free¹.